Puzzle of the Week
Numerical Jigsaw
by Erich Friedman Arrange the six vertical strips within the rectangle above so that each row contains a true equation. Strips can be rotated 180ยบ.
Crossword by Myles Mellor
Across 1 Tool condition problem with particles adhering to the cutting edge during chip removal, abbr. 4 Microprocessor-based controller, for short 6 Molding process which allows the rapid molding of [...]
The Five-Pointed Star
A five-pointed star is made of circular spots held together by wire. The fifteen spots hold 1-15 stones (each number is used once). Each of the five circles holds 40 [...]
A Simple Cryptarithm
by Henry E. Dudeney This cryptarithm is built in such a way that first you multiply two numbers and then add to the result one extra number to get the [...]
The Snake Cross
Among the four colored snakes (black, blue, green, and red), can you find the shortest one?
Crossword by Myles Mellor
Across 1 It has a circular blade to cut metal (2 words) 5 Tongue ____ machine 7 Paul McCartney title 8 Brass component 10 Very long time 11 Borders Down [...]